Concentrating-table.



No. 692,495. Patented Feb. 4, I902.

J. A. B. WESLEY.

GDNCENTRATING TABLE.

(Application filed Mar. 1, 1901.)

3 Sheets Sheet I.

(No Model.)

we uonms Farms cu. Wore-mum, WASHINGYQN, D c

'No. 692,495. J. A. B. WESLEY.

GONCENTRATING TABLE.

{Application filed Mar. 1, 1901.)

(N0 Modal.)

Patented Feb. 4,1902.

3 Sheets-Sheet 2.

No. 692,495. Patented Feb. 4, I902. J. A. B; WESLEY. CDNGENTRATINGTABLE.

(Application filed Mar. 1, 1901.)

3 Sheets-Sheet 3.

(No Model.)

llNTTEb STATES PATENT CEEICE.

JOHN ALBERT BLACKALL TVESLEY, OF GAVVLER, SOUTH AUSTRALIA, AUSTRALIA.

CONCENTRATlNG-TABLE.

SPECIFICATION forming part of Letters Patent No. 692,495, dated February4,1902. Application filed March 1, 1901. Serial No. 491495. (No model.)i

To ctZZ 207mm it may concern:

, Be it known that LJoHN ALBERT BLACKALL TVESLEY, mining engineer, asubject of the King of Great Britain,residing at Church Hill, in thecity of Gawler, in the State of South Australia and Commonwealth ofAustralia, have invented certain new and useful Improvements inOoncentrating-Tables,of which the following is a specification.

My invention relates to improvements in concentratingtables for thetreatment of slimes or other metalliferous material in a finely-dividedstate, and refers more particularly to horizontal tables in which thematerial is separated by being subjected to the action of flowing waterand the motion of the table.

In concentrating-tables as at present in use various motions areimparted to the tables for.

the purpose of maintaining the material in a constant state of agitationand causing the particles to separate form each other according to theirspecific gravities.

The object of my present invention is to provide a concentrating-tablehaving-a special motion capable of adjustment and of variation in speedof travel while in its orbit, so that the particles are caused toseparate out from each other and the heavier particles to travel in adirection in opposition to the flow of water, which at the same timeWashes away the lighterparticles or gangue. I accomplish this object byproviding a concentrating-table having a movement of travel in anelliptical or quasielliptical path in a horizontal plane, such movementbeing adjustable and capable of being applied at varying angles inopposition to the flow of water. The movement or travel is alsoadjustable in speed over certain portions of the orbit, so that a sloweror quicker return may be given to the table on the backward movement,according to the class of material under treatment, and, if necessary, apercussive shock may be imparted at any point of its travel. Thematerial under treatment is thus caused to move on the face of the tablein the direction of the major axis of the elliptical or quasi-ellipticalpath in which the table travels. Since this motion is adjustable and iscapable of being applied at varying angles, so that its major axis maybe at any desired angle to the longitudinal axis of the table, theparticles are subjected more or less to the action of the table and thewater, according to the class of material undertreatment.Theheavierparticlesarethus caused to travel along the table inopposition to the flow of water, which at the same time Washes away thelighter particles or gangue, therebyetfectingacompleteseparation. Thisparticular motion may be imparted to the table by any convenient device,but preferably by means of the mechanism illustrated in the accompanyingdrawings, in which Figure 1 is a plan of the table complete, while Fig.2 is an end view of the same, partly in section, showing mechanism foradjusting the incline of the table. Figs. 3, at, and dare diagrammaticviews showing the dilferent elliptical or quasi-elliptical motions whichmay be imparted to the table by the same mechanism arranged in differentpositions.

A is the main framework, preferably constructed of wood, upon which issupported the horizontal table B. The surface of this table B is coveredwith rubber, linoleum, or other suitable material and is mounted uponsupports B. These supports B work upon suitable bearings A, preferablyconsisting of balls working in oil-cups, whereby the table may be movedin any direction and the required motion imparted to it, as hereinafterdescribed. The table B is further mounted upon suitable inclinedsupports C, connected by means of a rod 0 to a lever C whereby theincline of the table may be adjusted from time to time, as may berequired in practice, according to the class of ore under treatment.Pipes D are further provided, whereby jets of water may be made to playupon the face of the table B in any direction. Suitable launders E E arearranged at the edge of the table, into which the products are discharged.

For the purpose of imparting the required movement to the table 13 in anelliptical or quasi-elliptical path the main framework A is providedwith a cast-iron or other frame F, in which is mounted a vertical shaftG. This shaft G is driven by miter-wheels G, actuated by the spur-wheelsII. These spur-wheels H are preferably made elliptic-shaped, whereby avariable speed may be imparted to the shaft G; but it will be wellunderstood that any device for imparting a variable motion may beemployed, and that, further, the shaft G may be driven with a constantspeed should it be required. Suitable pulleys H are provided forimparting motion from a belt in the ordinary way.

Upon the vertical shaft ll ismounted a triangular lever J, having threecorners JJ J At the corner J the triangular lever J is connected with aneccentric sleeve G upon the shaft G, by which an eccentric motion isimparted to it, and the amount of eccentricity may be regulated byadjusting the position of the sleeve G At the corner J this triangularlever J is connected with the head of the table B, while the remainingcorner J is connected to the end K of a lever K. This lever K is pivotedat its other end K to a block L, which is capable of being moved andfixed in any position in a quadrant L by means of the nut L Aconnecting-rod M is further provided, pivoted to the end K of theleverKand attached at its other end to the end N of a lever Ncorresponding to the lever K. This lever Nis also pivoted at its otherend N to a further block P, capable of being moved and fixed in anyposition in a quadrant P,corresponding to the quadrant L, by means of anut P The-end N of the lever N is connected to the tail of the table bya connecting-lever S, the end S of which is pivoted to the table B. Asthe shaft G rotates it imparts to the corner J of the triangular lever Jan eccentric motion. Since this lever J is pivoted at J to the end K ofthe lever K, it is compelled to move in the arc of a circle of which thelever K is the radius and the end K the center. A movement in anelliptical or quasi-elliptical path is consequently imparted to thetable B, as will be well understood by reference to Figs. 3, 4, and 5,in which the motion imparted is shown diagrammatically. In Figs. 3, 4,and 5 the dotted circle a a represents the circular path imparted by theeccentric sleeve G but for the purposes of illustration the eccentricityis shown somewhat exaggerated in proportion to the length of levers, andconsequently the motion imparted to the table is correspondinglyexaggerated. The line b 1) represents the arc traversed by the corner Jof the triangular lever J and the end K of the lever K, being the arc ofa circle of which the lever K is the radius and the end K the center,while the dotted lines 0 0 correspond to the quadrant L, upon which theposition of the block L and the end K of the lever K may be altered andadjusted as required. As the corner J of the triangular lever J travelsaround the circle a a the corner J moves along the arc Z) l), and thepoint J is thus caused to travel in an elliptical or quasi-ellipticalpath, as shown by the dot-and-dash lines d d. As this point J isconnected to the table B, it will be seen that the table B travels inthe elliptical or quasi-elliptical path, as shown by the lines (I d. InFig. 3

the end K of the lever K is so placed in in the quadrant L that amovement is imparted to the table Bin an elliptical or quasiellipticalpath 01 cl, as shown, having its major axis 6 6 parallel to thelongitudinal axis of the table, which is represented by the lines ff. InFig. 4 the end K of the lever K is shown as moved somewhat to theright-hand side of the quadrant L, when the movement imparted to thetable is such that the major axis 6 e of the elliptical orquasi-elliptical path (1 cl is at an angle to the longitudinal axis ffof the table. In Fig. 5 the end K of the lever K is shown moved stillmore to the right hand of the quadrant L, and the movement imparted tothe table in the elliptical or quasi-elliptical path d (Z has its majoraxis 6 e at a still greater angle to the longitudinal axis ff of thetable. It will thus be seen that by adjusting the position of the end Kof the lever K in the quadrant L the direction of the elliptical orquasi-elliptical motion imparted to the table can be regulated asdesired. Similarly the same motion is imparted to the tail of the tableby means of the connecting-rod M and levers N and S, by means of whichthe motion is imparted evenly to the whole table. It will thus be seenthat the end N of the lever N and the block P must be placed in the samerelative position in the quadrant P as the end K of the lever K and theblock L in the quadrant L.

According to the positions of the levers K and N a variable speed may beimparted to the elliptical or quasi-elliptical motion of the table whilemoving in its own orbit, and, if necessary, it may be made to travelfaster or slower at some portions of its path than at others. Thus inthe motion shown in Figs. 3, 4, and 5, with the shaft G and eccentric Gtraveling in the direction shown by the arrows upon the circles a a, aslow forward movement is imparted and a quick. return, and by reversingthe direction of the shaft G a quick forward movement and a slow returnmay be imparted, according to the require ments of the material undertreatment. This variable speed may be also used in conjunction with avariable driving-gear, as shown, should it be required.

In operation the material is fed upon the face of the table at'thecorner B and the shaft G is then driven at any suitable rate of speed bythe pulleys H. A movement in an elliptical or quasi-elliptical path isthus imparted to the table B, and the material is subjected to theaction of such motion, being thrown in the direction of its major axis.At the same time jets of water are caused to play upon the table fromthe pipes D and tend to wash the material down the face of the table.The direction of the elliptical or quasielliptical motion imparted tothe table may be regulated by adjusting the position of the levers K andN in the quadrants L and P in such manner that the particles of thematerial under treatment are thrown in any par ticulardirection,accordingto their respec tive specific gravities. Thus inorder to effect a better separation it may be necessary to impart to thetable movement in an elliptical or quasi-elliptical path having itsmajor axis parallel to the longitudinal axis of the table, as shown inFig. 4, when the positions of the levers K and N would becorrespondingly adjusted. In the treatment of some materials it will befound necessary to impart a movement in an elliptical orquasi-elliptical path having its major axis more or less at an angle tothe longitudinal axis of the table, that the particles may be thrown ina direction in opposition to the flow of water, and this may beaccomplished by the adjustment of the levers K and N. The heavierparticles are thus thrown in opposition to the flow of water, whichwashes away the lighter particles or gangue, and thus effects a completeseparation. At the same time the incline of the table may be adjusted bymeans of the lever 0 The heavier particles or concen trates aredelivered over the end of the table into launders E, while the otherproducts are received into the launders E, according to their respectivespecific gravities.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. The combination with a concentratingtable,of ahorizontally-disposed triangular 1ever connected at one angle to thetable, a driven eccentric at the second angle thereof, ahorizontallydisposed lever-arm pivoted at one end to a stationaryelement and at the other end to the third angle of the triangular lever,substantially as described.

2. The combination with a concentratingtable,0fa parallel motioncomprising two horizontally-disposed lever-arms, each pivoted at one endto a fixed element, and means to connect their free ends, a linkconnecting one of said levers to the table, a triangularlever connectedat one angle to the table and at the other to the end of the secondlever-arm, and means for moving the third angle of the tri angular leverin a circle, whereby an elliptical motion will be imparted to the wholetable, substantially as described.

3. The combination with a concentratingtable,of a parallel motioncomprising two horizontallydisposed lever-arms, fixed arcs in which saidlever-arms are adj ustably pivoted at one end and a rod connecting theirfree ends, a horizontally-disposed triangular lever having sides ofdifferent lengths and connected at one angle to the free end of one ofsaid lever-arms, at the second angle to the end of the table and meansat the third angle to move it in a circular path, whereby the table willreceive a practically elliptical motion in a horizontal plane,substantially as described.

4. The combination with a concentratingtable, of a horizontally-disposedparallel motion, a link to connect said parallel motion to the table,supports for the table having a universal motion in a horizontal plane,means to adjust the relative heights of said supports to vary theinclination of the table, a horizontally-disposed triangular leverconnected at one angle to the parallel motion, at the second angle toone end of the table and a driven eccentric at the third angle, wherebya substantially elliptical motion is imparted to the table,substantially as described.

5. The combination with a concentratingtable, of a horizontally-disposedparallel motion, a link to connect said parallel motion to the table,rolling ball-supports for the table, two cooperating wedges under eachsupport, means to simultaneously move one of the wedges under eachsupport to vary the inclination of the table, a horizontally-disposedtriangular lever having sides of unequal length, one angle of said leverconnected to the parallel motion, a second angle universally jointed toone end of the table, an eccentric at the third angle of the lever andelliptical gear to drive the eccentric, whereby a practically ellipticalmotion in a horizontal plane can be imparted to said table,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN ALBERT BLAOKALL WESLEY;

Witnesses:

CHARLES A. BURGESS, OLEM. A. HACK.

